165984887 has 2 divisors, whose sum is σ = 165984888. Its totient is φ = 165984886.

The previous prime is 165984827. The next prime is 165984901. The reversal of 165984887 is 788489561.

It is a strong prime.

It is an emirp because it is prime and its reverse (788489561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165984887 - 2¹² = 165980791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165984827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82992443 + 82992444.

It is an arithmetic number, because the mean of its divisors is an integer number (82992444).

Almost surely, 2^165984887 is an apocalyptic number.

165984887 is a deficient number, since it is larger than the sum of its proper divisors (1).

165984887 is an equidigital number, since it uses as much as digits as its factorization.

165984887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 56.

The square root of 165984887 is about 12883.5122152308. The cubic root of 165984887 is about 549.5697869887.

The spelling of 165984887 in words is "one hundred sixty-five million, nine hundred eighty-four thousand, eight hundred eighty-seven".